<template>
  <div class='icons'>
    <swiper :options="swiperOption">
      <swiper-slide v-for='(page, index) of pages' :key='index'>
        <div class='icon' v-for='item of page' :key='item.id'>
          <div class='icon-img'>
            <img class='icon-img-content' :src="item.imgUrl"/>
          </div>
          <p class='icon-desc'>{{item.desc}}</p>
        </div>
      </swiper-slide>
    </swiper>
  </div>
</template>

<script>
export default {
  name: 'HomeIcons',
  data () {
    return {
      swiperOption: {
        // 这里表示禁止轮播图自动滚动
        autoplay: false
      }
    }
  },
  computed: {
    pages () {
      const pages = []
      this.List.forEach((item, index) => {
        const page = Math.floor(index / 8)
        if (!pages[page]) {
          pages[page] = []
        }
        pages[page].push(item)
      })
      return pages
    }
  },
  props: {
    List: Array
  }
}
</script>

<style lang='stylus' scoped>
  @import '~styles/varibles.styl'
  @import '~styles/mixins.styl'
  .icons >>> .swiper-container
    // 这里依然是为了防抖动
    overflow hidden
    width 100%
    height 0
    padding-bottom 50%
  .icons
    margin-top .1rem
    .icon
      position relative
      overflow hidden
      float left
      width 25%
      height 0
      //这里设置高度是没用的，只能用padding-bottom撑开，这里宽高是1比1
      padding-bottom 25%
      .icon-img
        position absolute
        top 0
        left 0
        right 0
        bottom .44rem
        box-sizing border-box
        padding .1rem
        .icon-img-content
          display block
          margin 0 auto
          height 100%
      .icon-desc
        text-align center
        position absolute
        left 0
        right 0
        bottom 0
        height .44rem
        line-height .44rem
        color $darkTextColor
        // 当文字太多超出的时候下面三行就起作用了，多出的文字隐藏并且变成...
        // 这里把三行代码封装了
        ellipsis()
</style>
